Rotor core, rotor and motor

Abstract

The utility model discloses a rotor iron core, a rotor and a motor, the rotor iron core comprises an iron core body, and the iron core body is provided with a plurality of mounting grooves used for mounting magnetic steel at intervals along the circumferential direction of the iron core body; wherein an adsorption surface is formed on the groove wall of the mounting groove, and the magnetic steel is magnetically adsorbed by the adsorption surface. According to the rotor iron core, the adsorption surface capable of being magnetically adsorbed with the magnetic steel is formed on the groove wall of the mounting groove of the iron core body, so that the magnetic steel can be firmly adsorbed on the adsorption surface in the mounting groove after the magnetic steel is mounted in the mounting groove, the problem that the magnetic steel jumps out of the mounting groove due to repulsive force generated between different magnetic poles is effectively avoided, and the service life of the rotor iron core is prolonged. And the magnetic steel is easier to install.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a rotor core, a rotor and a motor. Background Art

[0002] At present, the rotors used in motors generally adopt an embedded magnetic steel structure. In the design stage of the rotor, the magnetized magnetic steel is usually embedded into the specified magnetic steel grooves on the rotor core and then injection molded. Since the polarities of the magnetic poles need to be distinguished when the rotor is injection molded with magnetic steel, the N pole and the S pole need to be installed alternately. Due to the staggered distribution of different magnetic poles, there will be a certain repulsive force between different magnetic poles when installing the magnetic steel, resulting in the magnetic steel embedded in the magnetic steel grooves on the core jumping out of the grooves, making the installation difficult. The installer needs to frequently press the magnetic steel back into the magnetic steel grooves, and the installation of the magnetic steel becomes very troublesome. Summary of the Utility Model

[0003] The embodiments of the utility model provide a rotor core, a rotor and a motor, which solve the problem that the magnetic steel jumps out of the magnetic steel groove due to the repulsive force of the magnetic poles when installing the magnetic steel.

[0004] In a first aspect, the embodiments of the utility model provide a rotor core, which includes:

[0005] A core body, which is provided with a plurality of installation grooves for installing magnetic steel at intervals along its circumferential direction;

[0006] Wherein, an adsorption surface is formed on the groove wall of the installation groove, and the adsorption surface magnetically adsorbs the magnetic steel.

[0007] In the rotor core provided by the embodiments of the utility model, the core body includes a magnetic adsorption core part and an isolation core part. A plurality of the isolation core parts are separated and arranged on one side of the magnetic adsorption core part in the axial direction along the circumferential direction of the magnetic adsorption core part. The installation groove is formed by enclosing together the adjacent two isolation core parts and the magnetic adsorption core part, and the adsorption surface is formed on the groove wall of the installation groove connected to the magnetic adsorption core part.

[0008] In the rotor core provided by the embodiments of the utility model, the core body further includes a connecting bridge core part, and the connecting bridge core part is arranged on both sides of the installation groove in the radial direction of the core body and is connected between the adjacent two isolation core parts.

[0009] In the rotor core provided by the embodiments of the utility model, the connecting bridge core part includes an outer connecting bridge part, and the outer connecting bridge part is arranged on the side of the installation groove far from the axis of the core body in the radial direction of the core body and is connected to the isolation core part.

[0010] In the rotor core provided by the embodiment of the present utility model, a plurality of outer connecting bridge parts are provided, and the plurality of outer connecting bridge parts are spaced apart in the axial direction of the core body. An outer communication port is formed between two adjacent connecting bridge core parts, and the outer communication port penetrates through to the installation groove in the radial direction of the core body.

[0011] In the rotor core provided by the embodiment of the present utility model, the connecting bridge core part includes an inner connecting bridge part, and the inner connecting bridge part is arranged on one side of the installation groove close to the axis of the core body in the radial direction of the core body and is connected to the isolation core part.

[0012] In the rotor core provided by the embodiment of the present utility model, a plurality of inner connecting bridge parts are provided, and the plurality of inner connecting bridge parts are spaced apart in the axial direction of the core body. An inner communication port is formed between two adjacent inner connecting bridge parts, and the inner communication port penetrates through to the installation groove in the radial direction of the core body.

[0013] In a second aspect, the embodiment of the present utility model provides a rotor, and the rotor includes the rotor core described in the first aspect above.

[0014] In the rotor provided by the embodiment of the present utility model, the rotor further includes an injection molded housing and injection molded skeleton ribs. The injection molded housing is attached to both sides of the core body in the axial direction, and the injection molded skeleton ribs are attached to the outer side of the core body in the radial direction and are connected to the injection molded housing.

[0015] In a third aspect, the embodiment of the present utility model provides an electric motor, and the electric motor includes the rotor described in the second aspect above.

[0016] The embodiment of the present utility model provides a rotor core, a rotor and an electric motor. The rotor core includes a core body, and a plurality of installation grooves for installing permanent magnets are arranged at intervals along the circumferential direction of the core body; wherein, an adsorption surface is formed on the groove wall of the installation groove, and the adsorption surface magnetically adsorbs the permanent magnet. By forming an adsorption surface on the groove wall of the installation groove of the core body of the rotor core provided by the embodiment of the present application, which can magnetically adsorb the permanent magnet, after the permanent magnet is installed in the installation groove, the permanent magnet will be firmly adsorbed on the adsorption surface in the installation groove, effectively avoiding the problem that the permanent magnet jumps out of the installation groove due to the repulsive force between different magnetic poles, and making it easier to install the permanent magnet. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 A perspective view of the rotor core provided by an embodiment of the present utility model;

[0019] Figure 2 Another perspective view of the rotor core provided by an embodiment of the present utility model;

[0020] Figure 3 An installation scenario view of the rotor core provided by an embodiment of the present utility model;

[0021] Figure 4 Another installation scenario view of the rotor core provided by an embodiment of the present utility model;

[0022] Figure 5 is Figure 1 An enlarged view of part A of

[0023] Figure 6 is Figure 1 An enlarged view of part B of

[0024] Figure 7 is Figure 2 An enlarged view of part C of

[0025] Figure 8 A perspective view of the annular rotor punching sheet provided by an embodiment of the present utility model;

[0026] Figure 9 A perspective view of the triangular rotor punching sheet provided by an embodiment of the present utility model;

[0027] Figure 10 A perspective view of the connecting bridge rotor punching sheet provided by an embodiment of the present utility model;

[0028] Figure 11 A perspective view of the rotor provided by an embodiment of the present utility model;

[0029] Figure 12 An axial sectional view of the rotor provided by an embodiment of the present utility model;

[0030] The reference numerals in the figure are as follows:

[0031] 100, rotor core; 10, core body; 101, installation groove; 1010, adsorption surface; 102, outer communication port; 103, inner communication port; 11, magnetic attraction core part; 1101, annular rotor punching sheet; 12, isolation core part; 1201, triangular rotor punching sheet; 13, connecting bridge core part; 1301, connecting bridge; 131, outer connecting bridge part; 132, inner connecting bridge part; 20, magnetic steel; 200, rotor; 201, injection molding housing; 202, injection molding skeleton rib; Detailed implementation manners

[0032] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0033] The directional terms mentioned in the present utility model, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "side", etc., are only with reference to the directions in the attached drawings. Therefore, the directional terms used are for explaining and understanding the present utility model, rather than for limiting the present utility model. In addition, in the drawings, structures that are similar or the same are denoted by the same reference numerals.

[0034] Refer to Figures 1 to 4 , specifically refer to Figure 1 , which shows an embodiment of the rotor core provided by the present utility model. The structure and working principle of the rotor core will be described in detail below with reference to the accompanying drawings of the specification. The rotor core includes a core body 10, and a plurality of mounting grooves 101 for mounting magnets 20 are arranged at intervals along the circumferential direction of the core body 10; wherein, an adsorption surface 1010 is formed on the groove wall of the mounting groove 101, and the adsorption surface 1010 magnetically adsorbs the magnet 20.

[0035] In specific implementation, the rotor core is a basic component structure of the rotor 200 of the motor. The rotor 200 of the motor mainly consists of components such as a rotor core, magnetic poles, and a rotating shaft. The rotor core is formed by laminating a certain number of rotor punching sheets, and the magnetic poles adopt magnets 20. After the magnets 20 are magnetized, they are used as magnetic poles. The magnetic poles formed by the magnets 20 are generally divided into N poles and S poles. When installing the magnetic poles, the N-pole magnets 20 and the S-pole magnets 20 are usually installed alternately in the mounting grooves 101 specifically used for installing the magnets 20. Since there will be an interaction between different magnetic poles, resulting in a repulsive force, when installing multiple magnets 20, some or all of the magnets 20 will jump out of the mounting grooves 101, and the magnets 20 cannot be fully installed in the mounting grooves 101. Installers need to continuously press the magnets 20 into the mounting grooves 101 by hand or place an object of a certain weight above the magnets 20 to prevent them from jumping out of the mounting grooves 101. The installation difficulty of the magnets 20 is very high, resulting in a significant reduction in the production efficiency of the rotor.

[0036] In this embodiment, as Figure 1As shown, the iron core body 10 is the main body part of the rotor iron core. During the design stage of the rotor iron core, the iron core body 10 is formed by laminating a certain number of rotor punching sheets. The iron core body 10 is provided with a plurality of mounting grooves 101 at intervals along its circumferential direction. The mounting grooves 101 are groove structures recessed on the surface of any one end of the iron core body 10 in the axial direction. The shape of the mounting grooves 101 can be arbitrary, and it can be designed as a regular or irregular groove. An adsorption surface 1010 is formed on the groove wall of each mounting groove 101. The adsorption surface 1010 can be formed on any groove wall of the mounting groove 101. For example, the adsorption surface 1010 can be formed on the groove wall of the mounting groove 101 in the radial direction of the iron core body 10, or the adsorption surface 1010 can be formed on the groove wall of the mounting groove 101 in the axial direction of the iron core body 10, which is not limited here. The adsorption surface 1010 is composed of ferromagnetic materials and can magnetically adsorb with the permanent magnet 20. For example, the adsorption surface 1010 is designed with ferromagnetic materials such as gadolinium, iron, cobalt, and nickel, and can all achieve magnetic adsorption with the permanent magnet 20. The area size of the adsorption surface 1010 can determine the magnetic adsorption ability. The area size of the adsorption surface 1010 can be specifically designed according to the size of the permanent magnet 20 and the size of the mounting groove 101. Usually, the more contact between the adsorption surface 1010 and the permanent magnet 20, the stronger the magnetic adsorption ability. When producing the rotor 200, during the stage of installing the permanent magnet 20, by inserting the permanent magnet 20 into the mounting groove 101 on the iron core body 10 from the notch of the mounting groove 101, so that the permanent magnet 20 is completely embedded in the mounting groove 101, the adsorption surface 1010 formed on the groove wall of the mounting groove 101 will magnetically adsorb the permanent magnet 20. The permanent magnet 20 is adsorbed in the mounting groove 101. The magnetic adsorption force between the permanent magnet 20 and the adsorption surface 1010 is sufficient to offset the repulsive force generated between different magnetic poles. The repulsive force between the magnetic poles cannot make the permanent magnet 20 break away from the adsorption surface 1010. The permanent magnet 20 is fixed in position in the mounting groove 101. After the permanent magnet 20 is completely installed in place, it will not jump out of the mounting groove 101. Thus, each permanent magnet 20 can be installed in place at one time until all the permanent magnets 20 are installed. The entire installation process is very easy and fast.

[0037] In this embodiment, by forming an adsorption surface on the groove wall of the mounting groove of the iron core body that can magnetically adsorb with the permanent magnet, after the permanent magnet is installed in the mounting groove, the permanent magnet will be firmly adsorbed on the adsorption surface in the mounting groove, effectively avoiding the problem that the permanent magnet jumps out of the mounting groove due to the repulsive force generated between different magnetic poles. The installation of the permanent magnet is easier, and the production efficiency of the rotor is improved.

[0038] In one embodiment, referring to Figures 1 to 4, the iron core body 10 includes a magnetic attraction iron core portion 11 and an isolation iron core portion 12. A plurality of the isolation iron core portions 12 are separately arranged along the circumferential direction of the magnetic attraction iron core portion 11 on one side in the axial direction of the magnetic attraction iron core portion 11. Two adjacent isolation iron core portions 12 and the magnetic attraction iron core portion 11 jointly enclose to form the installation groove 101, and the adsorption surface 1010 is formed on the groove wall where the installation groove 101 is in contact with the magnetic attraction iron core portion 11. In a specific implementation, the iron core body 10 is composed of a magnetic attraction iron core portion 11 and an isolation iron core portion 12. The magnetic attraction iron core portion 11 is integrally in a circular ring shape, and the magnetic attraction iron core portion 11 is designed with a ferrimagnetic material that can adsorb the magnet 20. The magnetic attraction iron core portion 11 is integrally formed by laminating annular rotor punching sheets 1101 of ferrimagnetic material as shown in Figure 8 . The isolation iron core portion 12 is integrally in a triangular prism shape and is designed with silicon steel material. The isolation iron core portion 12 is integrally formed by laminating triangular rotor punching sheets 1201 of silicon steel material as shown in Figure 9 . There are multiple isolation iron core portions 12, and multiple isolation iron core portions 12 are all arranged on one end face in the axial direction of the magnetic attraction iron core portion 11, and multiple isolation iron core portions 12 are separately arranged along the circumferential direction of the magnetic attraction iron core portion 11. A certain interval is maintained between two adjacent isolation iron core portions 12, so that two adjacent isolation iron core portions 12 and the magnetic attraction iron core portion 11 jointly enclose to form the installation groove 101. The two opposite sides of two adjacent isolation iron core portions 12 are the two side groove walls of the installation groove 101. The overall number of the isolation iron core portions 12 is the same as the number of the installation grooves 101. The isolation iron core portions 12 separate the installation grooves 101 from each other in the circumferential direction of the magnetic attraction iron core portion 11. The adsorption surface 1010 is formed on the groove wall where the installation groove 101 is in contact with the magnetic attraction iron core portion 11. Specifically, the adsorption surface 1010 is the part of one end face in the axial direction of the magnetic attraction iron core portion 11 between two adjacent isolation iron core portions 12, that is, the bottom part of the installation groove 101. When the magnet 20 is embedded in the installation groove 101 in place, the bottom of the magnet 20 contacts the adsorption surface 1010 in the installation groove 101, and the bottom of the magnet 20 will be magnetically adsorbed to the adsorption surface 1010. The adsorption surface 1010 provides the axial adsorption force of the iron core body 10, directly restricting the magnet 20 from moving away from the magnetic attraction iron core portion 11 along the axial direction of the iron core body 10. The magnetic adsorption force between the adsorption surface 1010 and the magnet 20 is sufficient to offset the repulsive force between the magnetic poles, making the magnet 20 more stable in the installation groove 101. After the magnet 20 is completely installed in place, it cannot jump out of the installation groove 101, enabling each magnet 20 to be installed in place in one step, and the installation of the magnet 20 is very convenient.

[0039] Furthermore, the iron core body 10 further includes a connecting bridge iron core portion 13, which is disposed on both sides of the mounting groove 101 in the radial direction of the iron core body 10 and is connected between two adjacent isolation iron core portions 12. In a specific implementation, the iron core body 10 is also composed of the connecting bridge iron core portion 13. The connecting bridge iron core portion 13 is mainly designed with silicon steel material. The connecting bridge iron core portion 13 as a whole is laminated by connecting bridge rotor laminations made of silicon steel material as shown in Figure 10 . The connecting bridge stator lamination is formed by sequentially connecting a plurality of triangular rotor laminations 1201 through connecting bridges 1301. After the connecting bridge stator laminations are laminated, a part of the triangular rotor laminations 1201 overlap to become a part of the isolation iron core portion 12, while the connecting bridges 1301 overlap to form the connecting bridge iron core portion 13. The connecting bridge iron core portion 13 mainly serves as the groove wall of the mounting groove 101 in the radial direction of the iron core body 10. Since the mounting groove 101 is jointly enclosed by two adjacent isolation iron core portions 12 and the magnetic attraction iron core portion 11, the mounting groove 101 needs a structure to restrict the radial movement of the magnet 20 along the radial direction of the iron core body 10. The connecting bridge iron core portion 13 is arranged on both sides of the mounting groove 101 that are far away from each other in the radial direction of the iron core body 10. The connecting bridge iron core portion 13 is located between two isolation iron core portions 12 and is fixedly connected to the two isolation iron core portions 12. The connecting bridge iron core portion 13 is used as the groove wall of the mounting groove 101 at the inner side and the outer side in the radial direction of the iron core body 10. The height of the connecting bridge iron core portion 13 in the axial direction of the iron core body 10 is not limited. After the magnet 20 is inserted into the mounting groove 101 in place, the magnet 20 is magnetically adsorbed on the adsorption surface 1010. The two opposite sides of the magnet 20 in the radial direction of the iron core body 10 are blocked by the connecting bridge iron core portion 13, so that the magnet 20 cannot move in the radial direction of the iron core body 10, and the magnet 20 can be more stable in the mounting groove 101.

[0040] In one embodiment, referring to Figures 1 to 4, the connecting bridge iron core part 13 includes an outer connecting bridge part 131. The outer connecting bridge part 131 is arranged on the installation groove 101 on the side away from the axis of the iron core body 10 in the radial direction of the iron core body 10 and is connected to the isolated iron core part 12. In a specific implementation, the connecting bridge iron core part 13 includes an outer connecting bridge part 131. The outer connecting bridge part 131 is arranged on the installation groove 101 on the side away from the axis of the iron core body 10 in the radial direction of the iron core body 10, between two adjacent isolated iron core parts 12 and is fixedly connected to the two adjacent isolated iron core parts 12. The outer connecting bridge part 131 is used as the groove wall on the side of the installation groove 101 away from the axis of the iron core body 10, that is, the outer connecting bridge part 131 is the groove wall of the installation groove 101 on the outer side in the radial direction of the iron core body 10. After the magnet 20 is embedded in the installation groove 101 in place, the magnet 20 is magnetically adsorbed on the adsorption surface 1010. The side of the magnet 20 facing away from the axis of the iron core body 10 in the radial direction of the iron core body 10 is blocked by the outer connecting bridge part 131, so that the magnet 20 cannot move towards the outer side in the radial direction of the iron core body 10, and the magnet 20 can maintain a stable state in the installation groove 101.

[0041] Further, referring to Figure 5 , there are a plurality of the outer connecting bridge parts 131. The plurality of outer connecting bridge parts 131 are arranged at intervals in the axial direction of the iron core body 10. An outer communication port 102 is formed between two adjacent connecting bridge iron core parts 13. The outer communication port 102 penetrates along the radial direction of the iron core body 10 into the installation groove 101. In a specific implementation, in one installation groove 101, there are a plurality of outer connecting bridge parts 131. The thickness of each outer connecting bridge part 131 in the axial direction of the iron core body 10 is maintained at about two or three rotor punching sheet thicknesses. The plurality of outer connecting bridge parts 131 are arranged at intervals along the axial direction of the iron core body 10. A certain distance is maintained between two adjacent outer connecting bridge parts 131, so that an outer communication port 102 is formed between two adjacent outer connecting bridge parts 131. The more the number of the outer connecting bridge parts 131 is set, the more the outer communication ports 102 are formed. Overall, a plurality of spaced-apart outer communication ports 102 are formed in the axial direction of the iron core body 10, and each outer communication port 102 penetrates into the installation groove 101. Each outer communication port 102 is equivalent to an opening on the outer peripheral surface of the iron core body 10 penetrating into the installation groove 101. During the design of the rotor, after the installation of the magnet 20 is completed, the rotor iron core needs to be injection-molded. The semi-finished product (the rotor iron core with the magnet 20 installed) is placed into the injection mold cavity and integrally injection-molded by the mold. During injection molding, the hot plastic particles can be injected into the outer communication port 102 formed between two adjacent outer connecting bridge parts 131 and molded. The injection-molded skeleton formed after injection molding extends into the outer communication port 102. The width of the injection-molded skeleton is thickened and the strength is improved, which can effectively reduce the risk of the injection-molded skeleton formed after the injection molding of the rotor 200 breaking.

[0042] In one embodiment, referring to Figure 6 and Figure 7 , the connecting bridge iron core portion 13 includes an inner connecting bridge portion 132, and the inner connecting bridge portion 132 is disposed in the installation groove 101 on a side closer to the axis of the iron core body 10 in the radial direction of the iron core body 10 and is connected to the isolation iron core portion 12. In a specific implementation, the connecting bridge iron core portion 13 includes an inner connecting bridge portion 132. The inner connecting bridge portion 132 is disposed in the installation groove 101 on a side closer to the axis of the iron core body 10 in the radial direction of the iron core body 10, between two adjacent isolation iron core portions 12 and is fixedly connected to the two adjacent isolation iron core portions 12. The inner connecting bridge portion 132 serves as the groove wall on the side of the installation groove 101 closer to the axis of the iron core body 10, that is, the inner connecting bridge portion 132 is the groove wall at the inner side in the radial direction of the iron core body 10 of the installation groove 101. After the magnet 20 is embedded in the installation groove 101 in place, the magnet 20 is magnetically adsorbed on the adsorption surface 1010. The side of the magnet 20 facing the axis of the iron core body 10 in the radial direction of the iron core body 10 is blocked by the inner connecting bridge portion 132, so that the magnet 20 cannot move toward the inner side in the radial direction of the iron core body 10, and the magnet 20 can maintain a stable state in the installation groove 101.

[0043] Furthermore, referring to Figure 6 and Figure 7, a plurality of the inner connecting bridge portions 132 are provided, and the plurality of inner connecting bridge portions 132 are arranged at intervals in the axial direction of the iron core body 10. An inner communication port 103 is formed between two adjacent inner connecting bridge portions 132, and the inner communication port 103 penetrates radially through the iron core body 10 to the installation groove 101. In a specific implementation, within one installation groove 101, a plurality of inner connecting bridge portions 132 are provided, and the thickness of each inner connecting bridge portion 132 in the axial direction of the iron core body 10 is maintained at about two or three rotor punching sheet thicknesses. The plurality of inner connecting bridge portions 132 are arranged at intervals along the axial direction of the iron core body 10, and a certain distance is maintained between two adjacent inner connecting bridge portions 132, so that an inner communication port 103 is formed between two adjacent inner connecting bridge portions 132. The more the number of the inner connecting bridge portions 132 is, the more the formed inner communication ports 103 are. Overall, a plurality of inner communication ports 103 distributed at intervals are formed in the axial direction of the iron core body 10, and each inner communication port 103 penetrates into the installation groove 101. Each inner communication port 103 is equivalent to an opening on the inner circumferential surface of the iron core body 10 that penetrates into the installation groove 101. During the rotor design stage, after the installation of the magnet 20 is completed, the rotor iron core needs to be injection-molded. The semi-finished product (the rotor iron core with the magnet 20 installed) is placed into the cavity of the injection mold, and is integrally injection-molded by the mold. During injection molding, the hot plastic particles can be injected into the inner communication port 103 formed between two adjacent inner connecting bridge portions 132 and be molded. The injection skeleton formed after injection molding extends into the inner communication port 103, the width of the injection skeleton is thickened, and the strength is improved, effectively reducing the risk of fracture of the injection skeleton formed after the injection molding of the rotor 200.

[0044] In one embodiment, a rotor 200 is provided. Referring to FIGS. 11 and Figure 12 , the rotor 200 includes the rotor iron core 100 described in the above embodiment. The rotor 200 is composed of the rotor iron core 100 and the magnet 20, and the magnet 20 is installed in the installation groove 101 on the rotor iron core 100. During the magnet installation stage of the rotor iron core 100, the magnet 20 is embedded into the installation groove 101. Since the groove wall of the installation groove 101 forms an adsorption surface 1010, the magnet 20 contacts the adsorption surface 1010 in the installation groove 101, and the magnet 20 and the adsorption surface 1010 are magnetically adsorbed together, thus preventing the magnet 20 from jumping out of the installation groove 101 due to the repulsive force between magnetic poles. Each magnet 20 can be installed in place in one step. After the magnet 20 is installed, the magnet 20 remains in a stable state in the installation groove 101. Among them, the rotor iron core 100 in this embodiment adopts the rotor iron core 100 described in the above embodiment. Since the specific structure of the rotor iron core 100 has been introduced in detail in the above embodiment, for the sake of simplicity of the specification, it will not be elaborated here.

[0045] Furthermore, as shown in Figure 11 and Figure 12As shown, the rotor 200 further includes an injection molded housing 201 and injection molded frame ribs 202. The injection molded housing 201 is attached to both axial sides of the iron core body 10, and the injection molded frame ribs 202 are attached to the radial outer side of the iron core body 10 and connected to the injection molded housing 201. In a specific implementation, the rotor 200 is a finished product obtained by an injection molding process after the permanent magnet 20 is installed on the rotor core 100. The injection molding process is to inject hot plastic particles into the mold cavity to form an integral body. The injection molded housing 201 is a structure formed by the hot plastic particles molding on the two end faces of the rotor core 100 in the axial direction, and it is closely attached to the two end faces of the rotor core 100 in the axial direction. The injection molded frame ribs 202 are structures formed by the hot plastic particles molding on the radial outer surface of the rotor core 100, and they are closely attached to the radial outer surface of the rotor core 100 in the axial direction. The number of injection molded frame ribs 202 is multiple, and the position of each injection molded frame rib 202 corresponds one-to-one to the pole position formed by the permanent magnet 20. The injection molded frame ribs 202 and the injection molded housing 201 are connected into an integral body, jointly forming the injection molded frame structure of the rotor 200, which can protect the rotor core 100, and can reduce noise and improve the stability of the rotor 200.

[0046] In an embodiment, a motor is provided. This motor applies the rotor 200 described in the above embodiment. This motor further includes components such as a housing and a stator. The rotor 200 is arranged inside the stator. The stator is used to generate a rotating magnetic field to interact with the rotor 200 to make the rotor 200 rotate, so that the motor can operate. Among them, since the specific structure of the rotor 200 has been described in detail in the above embodiment, for the sake of simplicity of the specification, it will not be elaborated here.

[0047] In the motor of this embodiment, due to the adoption of the rotor provided by the present utility model, the reliability of the motor is better.

[0048] The above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of various equivalent modifications or replacements, and these modifications or replacements should all be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.

Claims

1. A rotor core, characterized in that: include: The core body is provided with a plurality of installation slots for installing magnetic steel at intervals along its circumference; Wherein, an adsorption surface is formed on the groove wall of the installation groove, and the adsorption surface magnetically adsorbs the magnetic steel.

2. The rotor core according to claim 1, characterized in that: The core body includes a magnetically attractive core part and an isolated core part, and a plurality of the isolated core parts are separated and arranged along the circumference of the magnetically attractive core part on one side of the axial direction of the magnetically attractive core part. Two adjacent isolated core parts and the magnetically attractive core part jointly enclose the mounting groove, and the adsorption surface is formed on the groove wall where the mounting groove and the magnetically attractive core part are connected.

3. The rotor core according to claim 2, characterized in that: The core body further includes a bridge core portion, which is arranged on both sides of the installation groove in the radial direction of the core body and connected between two adjacent isolation core portions.

4. The rotor core according to claim 3, characterized in that: The connecting bridge core part comprises an outer connecting bridge part, which is arranged on a side of the installation groove away from the axis of the core body in the radial direction of the core body and connected to the isolation core part.

5. The rotor core according to claim 4, characterized in that: There are multiple external connecting bridge parts, which are spaced apart in the axial direction of the core body, and an external connecting opening is formed between two adjacent connecting bridge core parts, and the external connecting opening passes through the radial direction of the core body to the installation groove.

6. The rotor core according to any one of claims 3 to 5, characterized in that: The connecting bridge core part includes an inner connecting bridge part, which is arranged in the installation groove on a side of the core body radially close to the core body axis and connected to the isolation core part.

7. The rotor core according to claim 6, characterized in that: There are multiple inner connecting bridges, which are spaced apart in the axial direction of the core body, and an inner connecting opening is formed between two adjacent inner connecting bridges, which penetrates into the mounting groove along the radial direction of the core body.

8. A rotor, characterized in that: The invention comprises a rotor core as described in any one of claims 1 to 7.

9. The rotor according to claim 8, characterized in that The rotor further comprises an injection-molded shell and injection-molded skeleton ribs. The injection-molded shell is attached to two axial sides of the core body, and the injection-molded skeleton ribs are attached to the radial outer side of the core body and connected to the injection-molded shell.

10. A motor, characterized in that: Comprising the rotor described in any one of claims 8-9.

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